Li-S Energy: developing next-generation lithium-sulfur batteries. Li-S Energy is an Australian company developing lithium-sulfur and lithium-metal batteries with energy densities far in excess of current-generation lithium-ion batteries. IDTechEx interviewed Joe Urli, Head of Strategic Partnerships at Li-S Energy, to discuss the company's technology and production ramp-up plans. Li-S Energy: developing next-generation lithium-sulfur batteries.